gets to the capitol rail mail room. >>justtechnologybutalso a combination of skills we teach people. there are fbi protocols to follow. >> the procedures work with washington, d.c.. they were discovered in the off site location. the screening doesn't work that. is where training can provide protection. >> there is a fine line between threatening and having a right to disagree. >> nothing chemical has been detected in mail sent to late leaders. >> state senator has been targeted several times. reese yeently by an engineer who police say sent death threats to the san francisco democrat. investigators found materials in this suspect's garage he is aware his next hate mail could contain ricin. >> providing security in this capitol. so it's on your mind and it's separated by assuming that the appropriate authorities are going to protect you and it's taken heart. >> yee says in sacramento, abc 7 news. >> a san francisco land snark a new location on the water front. new exploratorium opened after moving from long time location at the palace of fine arts. this museum has been offering fun t